LM2902M Equivalent & Substitute Parts

Part Overview

The LM2902M is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface mount package. Manufactured by Texas Instruments under the LinCMOS™ series, this device is classified as obsolete. The LM2902M operates across a wide supply voltage range of 3V to 32V with a gain bandwidth product of 1 MHz, making it suitable for general analog signal processing applications.

Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, procurement reliability, and long-term product support. Active alternatives with comparable electrical characteristics and package compatibility are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	-
Number of Circuits	4	-
Gain Bandwidth Product	1	MHz
Current - Input Bias	45	nA
Voltage - Input Offset	2	mV
Current - Supply	1.5	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	32	V
Operating Temperature	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the LM2902M is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Number of circuits: 4 independent amplifier stages
Package type: 14-SOIC or equivalent 14-pin surface mount configuration
Supply voltage range: Minimum 3V, maximum 32V or higher
Gain bandwidth product: 1 MHz or greater
Current output per channel: 40 mA or greater
Input bias current: 45 nA or lower
Input offset voltage: 2 mV or lower
Operating temperature range: Must encompass -40°C to 85°C minimum

Substitution Groups:

Group 1: Direct Texas Instruments Equivalents Parts maintaining identical electrical specifications and LinCMOS™ series characteristics with active product status.

Group 2: Cross-Manufacturer Alternatives (onsemi) Parts with comparable performance metrics, different packaging options, and active production status.

Group 3: Enhanced Performance Alternatives Parts exceeding minimum specifications in gain bandwidth product, slew rate, or temperature range while maintaining core compatibility.

Group 4: Functional Equivalents with Parameter Variations Parts meeting core substitution criteria with minor deviations in secondary parameters such as slew rate or supply current.

Parameter Comparison

Part Number	Manufacturer	Product Status	GBW (MHz)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Package
LM2902M	Texas Instruments	Obsolete	1	45	2	1.5	40	-40 to 85	14-SOIC
LM2902M/NOPB	Texas Instruments	Active	1	45	2	1.5	40	-40 to 85	14-SOIC
LM2902MX/NOPB	Texas Instruments	Active	1	45	2	1.5	40	-40 to 85	14-SOIC
LM2902DR2G	onsemi	Active	1	90	2	-	40	-40 to 105	14-SOIC
LM2902VDR2G	onsemi	Active	1	90	2	-	40	-40 to 125	14-SOIC
LM2902D	onsemi	Obsolete	1.2	20	3	1.4	30	-40 to 125	14-SOIC
LM2902DT	Rohm Semiconductor	Not For New Designs	0.8	20	1	1	30	-40 to 125	14-SOIC
BA2902F-E2	Rohm Semiconductor	Active	0.5	20	2	0.7	30	-40 to 125	14-SOP
BA2902SF-E2	Rohm Semiconductor	Active	0.5	20	2	0.7	30	-40 to 105	14-SOP
LM124DT	STMicroelectronics	Active	1.3	20	2	1.5	40	-55 to 125	14-SO
LM224ADT	STMicroelectronics	Active	1.3	20	2	1.5	40	-40 to 105	14-SO

Engineering Selection Recommendations

Tier 1: Direct Replacement (Recommended)

LM2902M/NOPB and LM2902MX/NOPB from Texas Instruments are the primary recommended substitutes. Both maintain identical electrical specifications to the original LM2902M while offering active product status and ROHS3 compliance. These parts are functionally interchangeable with no design modifications required. LM2902M/NOPB is supplied in tube packaging, while LM2902MX/NOPB is available in cut tape and digi-reel format for automated assembly.

Tier 2: Cross-Manufacturer Alternatives (Active Production)

LM2902DR2G and LM2902VDR2G from onsemi provide active production status with identical package configuration and core electrical performance. The LM2902VDR2G extends the operating temperature range to -40°C to 125°C, offering enhanced thermal performance. Input bias current specification is higher at 90 nA compared to the original 45 nA; this difference is acceptable for general-purpose applications where input impedance is not critical.

Tier 3: Enhanced Performance Alternatives

LM124DT and LM224ADT from STMicroelectronics exceed the original specifications with gain bandwidth product of 1.3 MHz and slew rate of 0.4V/µs. LM124DT features differential output configuration and extended temperature range (-55°C to 125°C). LM224ADT maintains standard output configuration with -40°C to 105°C operating range. Both are in active production status.

Tier 4: Reduced Performance Alternatives (Conditional Use)

BA2902F-E2 and BA2902SF-E2 from Rohm Semiconductor are active alternatives with reduced gain bandwidth product (500 kHz) and lower output current per channel (30 mA). These parts are suitable only for applications where the reduced bandwidth and output current specifications are acceptable. Package width differs slightly (4.40mm vs. 3.90mm); PCB layout verification is required.

Compliance Considerations:

All recommended Tier 1 and Tier 2 alternatives maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements. Tier 3 alternatives also maintain full compliance. Tier 4 alternatives require compliance verification for specific applications.

Frequently Asked Questions (FAQ)

Q1: Can LM2902M/NOPB be used as a direct replacement for LM2902M?

A: Yes. LM2902M/NOPB is electrically and functionally identical to LM2902M. The primary difference is product status (active vs. obsolete) and packaging format (tube vs. standard). No circuit modifications are required. This is the recommended direct replacement.

Q2: What is the difference between LM2902M/NOPB and LM2902MX/NOPB?

A: Both parts are electrically identical with identical specifications. The difference is packaging format: LM2902M/NOPB is supplied in tube packaging, while LM2902MX/NOPB is supplied in cut tape and digi-reel format optimized for automated pick-and-place assembly. Select based on assembly process requirements.

Q3: Can onsemi LM2902DR2G replace LM2902M in all applications?

A: LM2902DR2G is functionally compatible for most general-purpose applications. The input bias current is higher (90 nA vs. 45 nA), which may affect performance in high-impedance input circuits. Verify input impedance requirements before substitution. Operating temperature range extends to 105°C, providing improved thermal margin.

Q4: What are the advantages of LM2902VDR2G over LM2902DR2G?

A: LM2902VDR2G extends the operating temperature range to -40°C to 125°C compared to -40°C to 105°C for LM2902DR2G. All other electrical specifications are identical. Select LM2902VDR2G for applications requiring operation at elevated temperatures above 105°C.

Q5: Why do BA2902F-E2 and BA2902SF-E2 have lower gain bandwidth product?

A: BA2902 series from Rohm Semiconductor is designed with different internal architecture, resulting in 500 kHz gain bandwidth product versus 1 MHz for LM2902 series. These parts are suitable for lower-frequency applications. Verify bandwidth requirements before substitution. Output current per channel is also reduced to 30 mA.

Q6: Are there package compatibility issues between 14-SOIC and 14-SOP variants?

A: 14-SOIC (0.154" width, 3.90mm) and 14-SOP (0.173" width, 4.40mm) are mechanically different. While both are 14-pin surface mount packages, the increased width of 14-SOP requires PCB footprint verification. Direct substitution on existing PCBs designed for 14-SOIC may not be possible without layout modification.

Q7: Can LM124DT or LM224ADT be used as drop-in replacements?

A: LM124DT and LM224ADT are functionally compatible with enhanced specifications (1.3 MHz gain bandwidth product vs. 1 MHz). Both maintain 14-SOIC package configuration and identical pin assignment. These are suitable drop-in replacements for applications where enhanced bandwidth is beneficial or neutral. No circuit modifications are required.

Q8: What is the significance of "Not For New Designs" status for LM2902DT?

A: LM2902DT from Rohm Semiconductor carries "Not For New Designs" status, indicating the manufacturer is transitioning away from this product. While currently available in inventory, this part should not be selected for new designs. Use active alternatives such as LM2902M/NOPB or LM224ADT instead.

Q9: How do I verify RoHS and REACH compliance for substitute parts?

A: All recommended Tier 1 and Tier 2 alternatives maintain ROHS3 compliance and REACH unaffected status, matching the original LM2902M. Compliance documentation is available from manufacturer datasheets. Verify compliance status in the part's technical documentation before final selection.

Q10: Which substitute part offers the best long-term availability?

A: LM224ADT from STMicroelectronics and LM2902VDR2G from onsemi both offer active production status with large inventory levels (34,870 and 45,400 units respectively). Both are suitable for long-term design commitments. LM2902M/NOPB from Texas Instruments also maintains active status with 2,640 units in stock.

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